"DAWNED" is a past tense verb that means to become clear or understood. In this context, it means that the meaning of a "freebie" suddenly became clear to the speaker.

As for the phrase "cho mik cấu trúc nx nha," it appears to be written in Vietnamese. However, it is not clear what it means as it seems to be a combination of words and abbreviations. Could you please provide more context or clarify the meaning of this phrase?